Aperture building material

摘要

Problem: it is excellent in view of Naikan, and provides an opening building material without dew condensation.The frame 1 has a frame 1 and a Shoji 2, and the frame 1 has an indoor side frame 11, 12, 13, 14 at an inner side portion of an indoor side, and the indoor side frame portions 11, 12, 13, 14 have projecting pieces 28 projecting outwardly to an inner peripheral side face 35, and the projecting piece 28 is a frame 15, 16 of the Shoji 2 A gap 32 is provided between the tip of the projection 28 and the glass surface 31 of the window 2.Diagram